Diabetes is a common chronic condition associated with the risk of heart disease, and eye and kidney damage. Many people are diagnosed with diabetes when they develop symptoms or complications, suggesting that the true onset of disease occurs years earlier. Early detection of diabetes may result in health benefits, but this is not proven. People of South Asian origin are at more risk of having diabetes and of getting the heart disease complications associated with it. The study aims to test whether screening for diabetes is feasible in a South Asian population and to measure the benefits of early detection and intensive treatment.